Fluid-meter



H. CHRISIVIAN.

FLUID METERI APPLICATION FILED DEC. 2o. 1917.

1.340,5@ @o Patente De@u 20, 1921.

more sensitively respond, to which feature this application is particularly directed.

As hreinbefore indicated, the shaft l? is supported in the sleeve i8 in bearings. 'Elie top bearing- 19 for the shaft is carried on tlie sleeve 18, and the bottom bearing 20 is carried in the nearing` blocla or .housing 2? at the bottom oi the sleeve i8. ',lliis housing 21 is preferably termed integrally With tire sleeve 18 and in general is in tlieforna of a moitier with an impertorate central portionD The shaft also has a thrust bearing on the stud 28. The central portion of the housing 2l is provided with anannular lip 22 and the upper surface or" tile central portion is curved upwardiy and arranged so as to direct a portion et the Water running downwardly through the propeller upwardly aga-inst the bottom ci the propeller, as shown by the arrows. the arrangement the propeller mechanism is subject to opposite pressures which are more or less equalized7 as a result ot which both the bearing 20 and the stud 23 are relieved oi the `@greatest part, if not all, ot the downward thrust. The propeller is thus substantially balanced, and its response to Hows is very sensitive by virtue of the reduction in traction. At the' instatut, tliereifores the valve C opens and Water be ins to iiow through the sleeve 18,1;he proe ler B will begin to rotate and the meter will register the flow, ln order to increase the efficiency of the propeller, the lip 22 terminates in a sharp edge and the upper sur a of the central portion of the housing is given a reverse curve so that the downwardly flowing; water may loe upwardly directed. with a minimum drop in pressure from frio tion losses.

l claim:

A meterinn device comprisin in combination a casing through Whiclilt e fluid to loev measured flot-vs, means in the casing for open ating the meter, said means being actuated by the lovv oic iuid through said casing, a bea-i`- ing for said means., and means cooperating with the operating` inea-ns and spaced away therefrom to entrap a relatively stagnant body of fluid therebetween subject to the impact of the r'luid ovving through the casing, the space being so formeel as to translate tlie impact pressure into a pressure against the operating means in a direction Opposite to the liow ci tluid which acts to relieve the pressure on the bearin',

lin testimony Whereoi l have hereunto signed my name.

HRACE CHRlSMiN. 

